Toggling between upper and lower case letter is quite challenging. There is a PHP inbuilt function’s which can do this operation PHP: strtoupper – Manual , PHP strtolower() Function & PHP: ucfirst – Manual , the real challenge would be you have to toggle case of the given word without using PHP built in function
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Reverse a string in PHP is pretty simple. PHP provides inbuilt function to reverse a string PHP: strrev – Manual but knowing the logic of how it works is very simple and interesting. In the interview you may come across “Write a PHP function which should reverse the given string, condition u should not use